Common and rare genetic variations associated with common variable immunodeficiency (CVID) and methods of use thereof for the treatment and diagnosis of the same

1. A solid support for detecting at least one common variable immunodeficiency (CVID)-associated copy number variation (CNV) in a sample comprising immobilized nucleic acid probes or primers of 15 or more nucleotides in length, wherein each of said probes or primers present on said solid support specifically hybridize to CVID specific nucleic acids in chromosomal regions consisting of chr11: 85365857-85381622, chr20: 57735790-57741780, chr22: 17396663-18417315, chr4: 10256682-10264316, and chr10: 46003146-46042543, chr2: 148396730-148433180, chr15: 35053039-35063531, chr7: 91789778-91801963, chr2: 163316298-163316595, chr7: 87180702-87191931, and, optionally, one or more of chr19: 9256584-9277749, chr4: 39190766-39201960, chr7: 18903915-18905725, chr5: 170531269-170536993, chr7: 34685030-34686172, and chr1: 170400944-170403742.

2. A kit comprising the solid support of claim 1 and reagents for detecting hybridization of nucleic acids to said solid support.